Abstract
Infrared detector arrays are very useful for spectroscopy to realize
grating spectrometers with the ability for parallel signal detection.
The signals from the detector pixels are usually very weak, and they
have to be amplified. Because of the large number of pixels, it is often
necessary to multiplex the signals to reduce the number of signal lines
out from the package. This work presents the preamplifier and
multiplexer modules built on low temperature co-fired ceramic (LTCC)
substrate. The LTCC material is suitable for hermetic packaging, which
is often needed for PbS detectors in process applications. The
capacitive cross coupling of the modules is measured from the modules.
The modules are implemented into a package next to the PbS array and the
nonlinearity and normalized detectivity of the system are measured. The
measurements show that special concern is needed in layout design to
avoid capacitive cross coupling. The measurements also show that
multiplexing does not deteriorate the good detectivity of the PbS
detector.
Original language | English |
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Pages (from-to) | 2188 - 2192 |
Number of pages | 5 |
Journal | Measurement Science and Technology |
Volume | 15 |
Issue number | 11 |
DOIs | |
Publication status | Published - 2004 |
MoE publication type | A1 Journal article-refereed |
Keywords
- LTCC-substrate
- array detector
- Hermetic packaging
- multiplexed read out electronics